Nteract Mobile Unified Communications Client for iPhone. Available with Business Feature Set, Network-based Provisioning, Fully Integrated your providers Communications Application Server for SIP dialing, multiple call handling, fixed mobile convergence, access to voicemail/message waiting indication (MWI), transfer, hold/resume, mute/unmute, conferencing, instant messaging, presence, click to call, click to email, click to chat, address books, call history and call recording. Download this app at the request of your service provider or IT administrator. Your service provider or IT administrator will provide you your login credentials